Panicum longum Hitchc. & Chase

Panicum longum Hitchc. & Chase, Contr. U. S. Nat. Herb. 15:
111. 1910.
Panicum munitum Trin.; Steud. Nom. Bot. ed. 2. 2: 260, hyponym. 1841.
Panicum pilosum macranthum Scribn. Circ. U. S. Dept. Agr. Agrost. 19: 1. 1900. Not P. macranthum Trin. 1825.
Plants perennial, ascending or spreading from a more or less geniculate base; culms rather robust, 1.2-2 meters long, simple or sparingly branching from the lower nodes, glabrous, the nodes glabrous; leaf-sheaths nearly as long as the internodes or overlapping, papillose or 233
papillose-hirsute (the greater number of papillae without hairs); ligule about 0.5 mm. long; blades ascending or spreading, 10-25 cm. long, 6-12 mm. wide, linear, scarcely narrowed to the rounded base, very sparsely papillose-pilose on the upper surface, glabrous beneath or with a few papillae; panicles short-exserted or included at the base, 20-25 cm. long, 2-5 cm. wide, the branches raceme-like, the lower solitary, distant, the middle and upper opposite or verticillate, the rachises and upper part of the main axis with stiff hairs slightly exceeding the short-pediceled, secund, approximate, but scarcely crowded spikelets; spikelets mostly in pairs, 2.5 mm. long, 0,9 mm. wide, pointed, strongly nerved, the nerves minutely scabrous toward the summit; first glume about half the length of the spikelet, pointed; second glume shorter than the sterile lemma, both slightly exceeding the fruit, the sterile palea obsolete; fruit 2.1 mm. long, 0.8 mm. wide, acute, thin in texture, scabrous toward the summit.
Type locality: Jalapa, Vera Cruz.
Distribution: Vera Cruz.

Panicum longum adalah spesies tumbuhan yang tergolong ke dalam famili Poaceae. Spesies ini juga merupakan bagian dari ordo Poales. Spesies Panicum longum sendiri merupakan bagian dari genus Panicum. Nama ilmiah dari spesies ini pertama kali diterbitkan oleh Hitchc. & Chase.

Panicum longum là một loài thực vật có hoa trong họ Hòa thảo. Loài này được Hitchc. & Chase mô tả khoa học đầu tiên năm 1910.